<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    let newVar = new Set([1,5,1,1,1,1,1,1]);
    console.log(newVar)
    var jj = new Map([['name','zjj'],['age',21]])
    console.log(jj)

    for(let i of newVar){
        console.log(i)
    }
    for(let i of jj){
        console.log(i)
    }
</script>
</body>
</html>